The guy who ran a rehearsal studio I used to rent had an older (original?) version of the Psychedelic Machine. I immediately recognized it as an effect used by Jimi Hendrix. One setting does a conventional phase shifter, while another is the sound from "Machine Gun" on Band of Gypsys and "The Star Spangled Banner" at Woodstock. It sounds like a double phase shifter, or even a bit lopsided.

Hi. I found one abandoned in a garage, and is in restauration process... for now is 100% operational after changing some capacitors and resistors...still have the original power transformer and works with 120volts input and a output of 16,5volts... I hope to put some photos and videos of final restauration.